Try this:

=IF(C2=0,0,C2-time(,50,)

Change the second 0 to "" if you want it to appear blank.

Hope this helps.

Pete

On Nov 7, 6:14 pm, jc wrote:
For the formula in D2 "=C2-time(,50,) with no time in cell C2, can the
default value ####### be changed (to zero (0) or a blank cell)

Regards

jc